Auger.



, "UNITED srarns PATENT orrioa JOHN MOORE, OF EAST LIVERPOOL, OHIO, ASSIGNOR OF ONE-HALF TO A. L. PRIER.

EAST LIVERPOOL, OHIO.

AUG-ER.

Specification of Letters Patent.

Patented Nov. 24, 1908.

To all whom it may concern:

Be it known that I, J OI-IN Moonn, a citizen of the United States, residing at East Liverpool, in the county of Columbiana and State oi Ohio, have invented certain new and useful Improvements in Angers; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it, ap pertains to make and use the same.

This invention relates to improvements in square hole angers.

The object of the invention is to provide an anger of this character by means of which a square hole may be formed simultaneously with the boring of the round hole by the main auger.

Another object is to provide a square hole auger which will be simple, strong, and durable in construction, eflicient in operation and well adapted to the purpose for which it is designed.

lVith the above and other objects in View, the invention consists in the construction, combination and arrangement of devices hereinafter described and claimed.

In the accompanying drawings,-l igure l is a perspective View of an anger constructed in accordance with the invention; Fig. 2 is a side view of the same partly in section; Fig. 3 is a cross sectional view; and Fig. l is an end elevation of the working end of the auger. Fig. 5 is a vertical sectional View of the auger.

Referring to the accompanying drawings for a more particular description of my invention, 1 denotes the auger, 2- denotes the round hole bit having an integral shank 3, between which and the bit 2 is formed an integral annular flange or collar at. On the bit 2 adjacent to and engaging the underside of the collar l is a wear plate or washer 5, against which is adapted to bear the upper end of a square hole or chisel bit 6 arranged on the drill bit 2 of the auger.

The square hole or chisel bit 6 is provided with a central longitudinally-(lisposed cylindrical bore or passage 7, through which the drill bit 2 projects and is adapted to turn. In two of the opposite sides of the chisel bit 6, near its outer end, are formed longitudinally-disposed slots 8, through which the borings are adapted to pass from the grooves of the drill or bit.

On the shank 3 of the bit is loosely mounted an apertured swivel plate or washer 9, which bears on the upper side of the collar 4 and is connected to the chisel bit 6 by means of spring metal strips or plates 10, in the lower ends of which are formed elongated openings 12 adapted to be engaged with headed lugs 13 arranged on the opposite sides of said chisel bit near the upper end of the same, as shown, whereby the bit 2 is revolubly and detachably held in engagement with the chisel bit. The edges of the lower end of the four sides of the chisel bit are beveled and sharpened to form cutting edges l l.

An auger constructed as herein shown and described is adapted to be used in connection with a drill press or brace, the cutting edges or chisels 14; of the chisel bit 6 cutting a square hole simultaneously with the forming of the round hole by the drill or bit 2. The anger is intended to be constructed and used for boring in wood or metal.

From the foregoing description, taken in connection with the accompanying drawings, the construction and operation of the invention will be readily understood without requiring a more extended explanation.

Various changes in the form, proportion and the minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantages of this invention, as defined by the appended claims.

Having thus described my invention, what I claim as new and desire to secure by LettersPatent, is,

1. An anger of the character described,

comprising a round hole bit having a shank, a tubular square hole bit engaged therewith, a bearing flange formed on the shank of said round hole bit, a wear plate arranged be tween said flange and the upper end of the square hole bit, a swivel plate loose on the shank of said round hole bit, bowed spring metal connecting plates rigidly secured to said swivel plate and having a detachable engagement with said square hole bit, substantially as described.

2. In an auger of the character described, the combination of a tubular square hole bit,

10 be engaged by the slotted ends of said connecting plate, whereby said square hole bit is detachably connected to said round hole bit to permit the latter to revolve therein.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

JOHN MOORE. Yvitnesses DAVID CHITWYND, GEORGE BENFORD. 

